Fitness device



FIG. 1 is a top perspective view of a fitness device embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof, the rear elevation view being identical thereto;

FIG. 4 is a left side elevation view thereof; and,

FIG. 5 is a bottom plan view thereof. 

CLAIM The ornamental design for an fitness device, as shown and described. 